diff --git a/Makefile.am b/Makefile.am
index eced317..89c5386 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,7 +119,9 @@
   ndn-cpp/encoding/wire-format.cpp \
   ndn-cpp/encoding/der/der-exception.cpp ndn-cpp/encoding/der/der-exception.hpp \
   ndn-cpp/encoding/der/der.cpp ndn-cpp/encoding/der/der.hpp \
+  ndn-cpp/encoding/der/visitor/certificate-data-visitor.cpp ndn-cpp/encoding/der/visitor/certificate-data-visitor.hpp \
   ndn-cpp/encoding/der/visitor/no-arguments-visitor.cpp ndn-cpp/encoding/der/visitor/no-arguments-visitor.hpp \
+  ndn-cpp/encoding/der/visitor/public-key-visitor.cpp ndn-cpp/encoding/der/visitor/public-key-visitor.hpp \
   ndn-cpp/encoding/der/visitor/simple-visitor.cpp ndn-cpp/encoding/der/visitor/simple-visitor.hpp \
   ndn-cpp/encoding/der/visitor/visitor.hpp \
   ndn-cpp/encoding/der/visitor/void-no-arguments-visitor.hpp \